How to fix these weird shading problems?
You might have some artifacts in your mesh after using the modifier. If it's just a shading issue, you could try turn on &quot;Auto Smooth&quot; in the object data properties and see if that fixes it. Auto Smooth also works best when your shading is set to Smooth. Another thing that can help is to clear the custom normal data on the model to make sure there aren't any other settings affecting  your shading.